Trolley-pole



J. METCALFE, Sn..

TROLLEY POLE..

APPLICATION FILED AUG-3 19H.

Patented ont. r7,1919.

, i iinrrnn srnirns rATnNfr onirica.

JOHN MnrcALrn, sa., or BROWNSVILLE, PENNSYLVANIA.

pivot pin or bolt 14, which is provided withV TROLLEY-POLE.

To all whom t may concern.' Y '1 Beit known that I,JoHN METCALFE, Sr., a citizen of the United States, residing at Brownsville, in the county of- Fayette and State of Pennsylvania, have invented certain newan'd usefulV Improvements in Trol-` ley-Poles; and I do hereby declare the f ol-f lowing to be a full, clear, and eXact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

This invention has for its object to provide an improved trolley pole for minemotors which is so constructed as to collapse or-fold up whenthe pole leaves the wire and strikes a projection on the roof, sopas to prevent breaking of the pole or damage to the motor or injury to the operator in consequence of the pole-s impact on a roof projection.

Another object is the provisionof a collapsible pole of this character which may be repaired and replaced in use with a minimum expenditure of labor and time. Y

With this and other objects in view, the invention consists in the novel construction, combination and arrangement of parts 'as will be hereinafter specificallly described, claimed and'illustrated in the accompanying drawing, in which 4igure 1 represents a side elevation of the improved trolley pole,

Fig. 2 represents an enlarged longitudinalv sectional view at right angles to Fig 1.

Fig. 3 represents a perspective view of one terminal of one of the trolley pole sections detached,

Fig. 4 represents a ldetail sectional view on the line 4:-4 of Fig. 1,

Fig. 5 is aside elevation of a modifiedforni of the device. Referring to the drawing in detail, wherein similar reference numerals designate cor-` responding parts throughout the several views, the numerals 8 and 9 indicate the iiiner andvouter sections of the trolley pole, the inner sections 8 being adapted forconnection with the usual type of spring actuated pole support or holder, and the outer section 9 carrying the harp or bracket 10 in which the trolley wheel 11 is rotatably supported.

The opposedside faces of the adjacent ends of the sections `8V and 9 are cut away, as indicated at 12.` Thereduced and overlapping ends of the sections'S and 9 are provided with alined `slots 13, receiving the Speccatonio'f Letters Patent.

Patented oct. 7, 1919. Appiieatin inea-August 3, i917. serial No. 184,274.

a Vnut 15,` a hole for linch pin to hold washer,

or other means of securing the sections and' lined by cutting away theadjacent terminals of the sections, are inclined in opposite directions so as to permit the outer section 9 to be folded back toward the inner section 8, as shown in dotted lines in Fig. 1.

The two sections 8 and 9 are normally retained in alinement by frangible tapered pins 1 7, which are tted in alined apertures 18 Aformed in the reduced terminals of the pole sections. lThe pinsV 17 may be constructed of wood, or any other suitable material, which will be readily broken when the pole leaves the wire and strikes the roof. The impact of the blow of the Wheel carrying end of the pole against the roof, or timbers of the minereadily breaks or severs the pins 17, allowing the outer section 9 to fold back to the dotted line position shown in F ig. 1 and instead of the danger of a roof falling caused by the timbers being broken out byl the rigid pole, it is avoided by the severed pins and folding pole. Also the delays resulting from the broken poles are ended by this invention. The motorinan instead of going to the shop for a new pole, puts his hand into his pocket for his punch, knocks out the broken pins with his hitching pin and is again readyin a couple of minutes by driving in two new pins. All danger to motormen, (which are many) resulting from the breaking of poles, are by this device eliminated, making this pole true to its title, a safety collapsible, or sectional trolley pole. The aforesaid sectional joint of this safety pole can be manufactured out of malleable iron, aluminum or any other suitable material and can be cast so that the sections 8 and 9 can `be inserted and held in correct alinement by abolt going through the casting and the pole inserted. This casting would -be an almost indestructible and ever ready means of averting trolley pole accidents. made of wood, it is usually desirable to make the joint of castings as described above.

What I' claim is 1. A trolley pole including a plurality of sections having the adjacent ends reduced and overlapped, means pivotally securing the adjacent overlapped ends of the central portion thereof, and frangiblemeans extending While the pole itself can be,

through the overlapped ends on each Side of the pivotal point to normally maintain the sections in alinement with each other.

2. A trolley pole including a plurality ot' Sections having the adjacent ends reduced and overlapped, means pivotally securing the adjacent-overlapped Vends at the central portion thereof, said sections having. alined tapered openings formed therein on each Side of the pivot point, and tapered frangible pins removably tted in said tapered openings. V

3. A trolley pole including a plurality of Copies ofv this patent may be obtained for rfive cents each, by addressing the Commissioner of Patents, Washington, D. C. 

